<mat-form-field class="example-full-width">
  <input matInput placeholder="过滤" [(ngModel)]="filter">
</mat-form-field>
<button mat-stroked-button color="primary"  (click)="test()">
  测试
</button>
<mat-form-field class="example-full-width">
  <input matInput placeholder="group" [(ngModel)]="group">
</mat-form-field>

<mat-divider></mat-divider>
<div>
  <button mat-stroked-button class="btn-list" color="primary" *ngFor="let i of icons" (click)="copy(i)">
    <i class="material-icons">{{i}}</i>{{i}}
  </button>
</div>



